Air pollution causes 200,000 early deaths each year in the US, study finds

Researchers from MIT's Laboratory for Aviation and the Environment have come out with some sobering new data on air pollution's impact on Americans' health.

The group tracked ground-level emissions from sources such as industrial smokestacks, vehicle tailpipes, marine and rail operations, and commercial and residential heating throughout the United States, and found that such air pollution causes about 200,000 early deaths each year. Emissions from road transportation are the most significant contributor, causing 53,000 premature deaths, followed closely by power generation, with 52,000.

In a state-by-state analysis, the researchers found that California suffers the worst health impacts from air pollution, with about 21,000 early deaths annually, mostly attributed to road transportation and to commercial and residential emissions from heating and cooking.

The researchers also mapped local emissions in 5,695 U.S. cities, finding the highest emissions-related mortality rate in Baltimore, where 130 out of every 100,000 residents likely die in a given year due to long-term exposure to air pollution.

"In the past five to 10 years, the evidence linking air-pollution exposure to risk of early death has really solidified and gained scientific and political traction," says Steven Barrett, an assistant professor of aeronautics and astronautics at MIT. "There's a realization that air pollution is a major problem in any city, and there's a desire to do something about it."

Barrett and his colleagues have published their results in the journal Atmospheric Environment.

Data divided

Barrett says that a person who dies from an air pollution-related cause typically dies about a decade earlier than he or she otherwise might have. To determine the number of early deaths from air pollution, the team first obtained emissions data from the Environmental Protection Agency's National Emissions Inventory, a catalog of emissions sources nationwide. The researchers collected data from the year 2005, the most recent data available at the time of the study.

They then divided the data into six emissions sectors: electric power generation; industry; commercial and residential sources; road transportation; marine transportation; and rail transportation. Barrett's team fed the emissions data from all six sources into an air-quality simulation of the impact of emissions on particles and gases in the atmosphere.

To see where emissions had the greatest impact, they removed each sector of interest from the simulation and observed the difference in pollutant concentrations. The team then overlaid the resulting pollutant data on population-density maps of the United States to observe which populations were most exposed to pollution from each source.

Health impacts sector by sector

The greatest number of emissions-related premature deaths came from road transportation, with 53,000 early deaths per year attributed to exhaust from the tailpipes of cars and trucks.

"It was surprising to me just how significant road transportation was," Barrett observes, "especially when you imagine [that] coal-fired power stations are burning relatively dirty fuel."

One explanation may be that vehicles tend to travel in populated areas, increasing large populations' pollution exposure, whereas power plants are generally located far from most populations and their emissions are deposited at a higher altitude.

Pollution from electricity generation still accounted for 52,000 premature deaths annually. The largest impact was seen in the east-central United States and in the Midwest: Eastern power plants tend to use coal with higher sulfur content than Western plants.

Unsurprisingly, most premature deaths due to commercial and residential pollution sources, such as heating and cooking emissions, occurred in densely populated regions along the East and West coasts. Pollution from industrial activities was highest in the Midwest, roughly between Chicago and Detroit, as well as around Philadelphia, Atlanta and Los Angeles. Industrial emissions also peaked along the Gulf Coast region, possibly due to the proximity of the largest oil refineries in the United States.

Southern California saw the largest health impact from marine-derived pollution, such as from shipping and port activities, with 3,500 related early deaths. Emissions-related deaths from rail activities were comparatively slight, and spread uniformly across the east-central part of the country and the Midwest.

While the study is based on data from 2005, Barrett says the results are likely representative of today's pollution-related health risks.

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Air pollution causes 200,000 early deaths each year in the US, study finds (2013, August 29)
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Which is about 312 million premature deaths....I think I'll take the air pollution thanks.

Erm..so your argument is that killing by shotgun is good because killing by nuclear weapon is worse?

Really?

Is that the type of logic you use in everyday life?

No, because that's not the type of logic I used in my argument.

As to the industrial revolution...well of course it allowed more people to exist on the planet. Just like the agricultural revolution did. Your population maximum is a function of the technology you use to feed people and the medical facilities you have at your command.

If you don't believe me look at a graph for human population pre and post agricultural and industrial revolution....please don't take my word for it.

If you shut down all factories, power plants, and use of industrial machinery tomorrow you'd have the population we had before we obtained all those nasty pollution making things in short order.

Ah. This explains why poorly industrialized areas of China and India have some of the highest non modern metropolitan population densities, and much of highly industrialized Europe is experiencing negative population growth.

Ah. This explains why poorly industrialized areas of China and India have some of the highest non modern metropolitan population densities, and much of highly industrialized Europe is experiencing negative population growth.

Reality check: the leading causes of premature deaths besides accidents and hospital mistakes are heart disease, diabetes and cancer, none of which are understood to be significantly impacted by smog. These are all highly correlated with income level however and low income also correlates with exposure to living near noisy highways, as Food & Health Skeptic John Ray has pointed out for years:

Air pollution causes 200,000 early deaths each year in the US, study finds

And yet people are living far longer than they did in pre-industrial times.

And their "science" isn't even correlated to the real world. That is, there's no indication (from this article) they even bothered to check vital statistics to see if real world results correlates with their supposition.

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